code: def positive_integer(value):
      """Ensure that the provided value is a positive integer.
  
      Parameters
      ----------
      value: string
          The number to evaluate
  
      Returns
      -------
      value: int
          Returns a positive integer
      """
      try:
          value = int(value)
      except Exception:
          raise argparse.ArgumentTypeError(
              "Invalid int value: '{}'".format(value)
          )
      if value < 0:
          raise argparse.ArgumentTypeError(
              "Invalid positive int value: '{}'".format(value)
          )
      return value
  
file_path: tpot/tpot/driver.py
imports: import numpy
  import pandas
  import argparse
  from sklearn.model_selection import train_test_split
  import sys
  import os
  from importlib import import_module
  from .tpot import TPOTClassifier, TPOTRegressor
  from ._version import __version__
label_desc: Use image node_id 1 for calling a global function with example usage: positive_integer(value) and returns: value